So long as you make no changes in the toolbar in between, you
can do as you suggest for this project only.
If you have another project with a slightly different
toolbar, you need to make a different substitute file.
For example, if you're putting the Search form in the toolbar
and change the width of the text entry box, the output file will be
different.
My preference is to alter the newest output file after
publishing. If you're not publshing, but copying the !SSL! package
directly, you would change the output whtbar.js file in that
directory.
If you can't edit files after publishing, you can publish to
another location on your hard drive, make your changes and send the
new package to its destination. If you have a convenient way to
compare the new output package with the old one,
you would send only the changed files.
Here's another chance for me to plug Beyond Compare, a very
useful tool in which I have absolutely no financial interest or
organizational connection, other than as a user.
It's easy to find on the Web.
Harvey